I think there are two ways with Huawei. Some things I can't comment about because, as I've just told you, I have a clearance. By reputation, Huawei is a company that has constantly stolen IP. If you have a look at the best-known case, of the Cisco routers, from, I think, 2012, there's a sense of business ethics.
Also, the other, more logical one is that if you buy their equipment, there is the potential for them to need to have access to the equipment for maintenance. If they choose to do espionage, then they can actually insert malware in your equipment. It could be hardware or it could be software, but we're very vulnerable.